AT520511A1 - Separating device for pipes - Google Patents

Abstract

Separating device (1) for pipes (3), comprising clamping means for fixing a pipe (3) relative to the separating device (1), a knife (11) with which the fixed by the clamping means tube (3) can be severed, and a Knife holder (10) which can move the knife relative to the fixed pipe (3), wherein the knife holder (10) and / or the separating device (1) are formed such that during the separation process, the knife (11) in the circumferential direction of the tube (3) is moved, in particular over the entire circumference of the tube (3) is moved in the circumferential direction.

Description

(57) Separating device (1) for pipes (3), comprising clamping means for fixing a pipe (3) relative to the separating device (1), a knife (11) with which the pipe (3) fixed by the clamping means can be cut , and a knife holder (10) which can move the knife relative to the fixed tube (3), the knife holder (10) and / or the separating device (1) being designed such that the knife (11) in Circumferential direction of the tube (3) is moved, in particular is moved in the circumferential direction over the entire circumference of the tube (3).

-1. Summary

Separating device (1) for pipes (3), comprising clamping means for fixing a pipe (3) relative to the separating device (1), a knife (11) with which the pipe (3) fixed by the clamping devices can be severed, and a Knife holder (10) which can move the knife relative to the fixed tube (3), the knife holder (10) and / or the separating device (1) being designed such that the knife (11) in the circumferential direction of the tube during the separating process (3) is moved, in particular is moved over the entire circumference of the tube (3) in the circumferential direction.

Fig. 6/22

-1 "pipe separator"

The present invention relates to a separation device for pipes according to the preamble of claim 1. The invention further relates to a separation system with such a separation device and a method for separating a section of a pipe, the method being carried out in particular with such a separation system or such a separation device.

Separation devices, separation systems and methods of the aforementioned type are known from the prior art. So far, such separation tasks in industrial applications have mainly been carried out using sawing or burning processes. Such methods result in a high amount of chips or dirt in connection with noise.

In addition, there are already applications in which a hardened steel knife is driven through the tube by means of linear movement in order to separate it. With such methods, depending on the application, an inhomogeneous burr is obtained, which in some cases is significantly larger than the permissible tolerances. Another undesirable side effect is the high wear on the elaborately designed knives, which is associated with high maintenance costs. This is particularly because the knife in such a separating device must be made comparatively large.

The problem underlying the present invention is

Creation of a separating device of the type mentioned at the outset, with which the separation of pipe sections is associated with less burr formation and / or with which the maintenance costs are lower. Furthermore, a separation plant with such a / 22nd

-2 separating device and a method of the type mentioned are specified.

This is achieved according to the invention by a separating device of the type mentioned at the outset with the characterizing features of claim 1, by a separating system of the type mentioned at the outset with the characterizing features of claim 9 and by a method having the features of claim 11.

According to claim 1 it is provided that the knife holder and / or the separating device are designed such that the knife is moved in the circumferential direction of the tube during the cutting process, in particular is moved in the circumferential direction over the entire circumference of the tube. The knife can preferably be made of hardened steel. Due to the movement of the knife in the circumferential direction, the knife can have a significantly smaller size, so that the maintenance costs can be reduced. Furthermore, the cutting process turns out to be more gentle during the rotation, so that the wear of the knife is less.

The separating device can be designed such that the knife shears the material of the tube from the inside out. This largely prevents the formation of a burr. The separating movement from the inside to the outside can be achieved in that the knife is moved a little way into the inside of the pipe through a slot made in the pipe before the cutting process.

There is the possibility that the clamping means comprise clamping jaws, which in particular likewise consist of hardened steel.

The separating device can be designed such that the / 22nd

-3Meters sheared the material of the tube against the jaws. The jaws thus support the separation process.

It can be provided that the separating device comprises more than one knife, the knives being arranged spaced apart in the circumferential direction in the knife holder, in particular wherein the knives have the same angular distances from one another in the circumferential direction. The knife holder and / or the separating device can be designed such that the knives are moved in the circumferential direction of the tube over a circumferential angle during the separating process, the size of the circumferential angle essentially corresponding to 360 ° divided by the number of knives. By using several knives, the time required for the cutting process can be reduced.

There is the possibility that the separating device comprises a swivel drive which can move the knife holder with the knife in the circumferential direction around the tube. A swivel drive can move the knife holder with the knife concentrically around the pipe using suitable means such as a worm or spur gear, thereby ensuring the free passage of the pipe.

According to claim 9, the separating system is designed such that the separating device can be moved in the longitudinal direction of the pipe, so that the separating device can cut off a section of the pipe during the movement at a predetermined position of the pipe.

It can be provided that the separating device can be moved together with the tube in the longitudinal direction of the tube by one

Section of the pipe during the movement of the pipe / 22

-4abzutrennen. This means that the separation system is also suitable for on-the-fly operation as part of industrial pipe production. For example, a profiling system runs in continuous operation at a predetermined speed. The separating system is able to synchronize the separating device to a predetermined position of the moving pipe and to separate a section of the moving pipe together with it.

Alternatively, the separation system can also operate in the so-called start-stop mode, in which a pipe is fed and stopped, from which a section is then separated in the non-moving state.

According to claim 11 it is provided that the method for severing a section of a tube is characterized by the following method steps:

At least one opening is made in the raw material from which the tube is made or in the tube,

the knife of a separating device, in particular a separating device according to the invention, is introduced into the at least one opening,

- The knife is guided in the circumferential direction through the wall of the tube until a section of the tube is separated.

By making an opening in the raw material from which the pipe is made, for example, the separation of the pipe section can be significantly simplified.

There can be more than one opening, the

Openings are spaced apart in the longitudinal direction of the tube.

In particular, the at least one opening can be a slot / 22

-5 be formed, which extends in particular in the circumferential direction of the tube.

The width of the opening, in particular the width of the slot, can essentially correspond to the width of the knife in the longitudinal direction of the tube, in particular the width of the knife plus a slight clearance.

Further features and advantages of the present invention will become clear from the following description of preferred exemplary embodiments with reference to the accompanying figures. In it show:

Fig. 1 a perspective, isometric view of a Embodiment of an inventive Separating device with a tube protruding through the separating device; Fig. 2 a front view of the separation device of FIG. 1; Fig. 3 a plan view of the separation device of FIG. 1; Fig. 4 a sectional view according to the arrows IV - IV in Fig. 3; Fig. 5 a perspective view of the pipe to be cut; Fig. 6 a front view of the separating device according to Figure 1 in a basic position of the knife, the clamping means of the separating device lying in front of the knife holder being hidden;

/ 22nd

-6Fig. 7 is a front view corresponding to FIG

Separating device in a first cutting position of the

diameter;

8 shows a front view corresponding to FIG. 6 of the separating device in a second cutting position of the knife;

9 shows a front view corresponding to FIG. 6 of the separating device in a third cutting position of the knife;

10 shows a front view corresponding to FIG. 6 of the separating device in a fourth cutting position of the knife;

FIG. 11 shows a front view corresponding to FIG. 6 of the separating device in a fifth cutting position of the knife;

FIG. 12 is a front view corresponding to FIG. 6 of the separating device in a sixth cutting position of the knife.

Identical and functionally identical parts are provided with the same reference symbols in the figures.

The illustrated embodiment of a separating device 1 according to the invention can be used to cut off a section 2 of a pipe 3, which is designed in particular as an endless pipe and is permanently moved in the longitudinal direction of the pipe (see FIG. 1). The separating device 1 can be part of a separating system, not shown, which separates the separating device 1 together with the pipe 3 in / 22

-7pipe can move to Section 2 during the longitudinal direction

To separate movement of the tube 3.

There is the possibility that the separation system is part of a larger system, which also comprises a profiling system, also not shown, in which the tube 3 is made from a flat raw material. The profiling system can run in continuous operation at a predetermined speed or output the tube 3 at a predetermined speed. The separating system can move the separating device 1 to a specific position of the pipe 3 and then synchronize the movement of the separating device 1 with that of the pipe 3 emerging from the profiling system so that both move at the same speed. In this state, the separating device 1 can be fixed on the pipe 3 and cut off a section 2 of the pipe 3.

Alternatively, it can be provided to have the separation system run in the so-called start-stop mode, in which a pipe is fed in and stopped after the desired position has been reached. The pipe section is then cut off when the pipe is at rest. There is no synchronization between the movement of the tube 3 and the movement of the separating device 1.

The separating device 1 comprises two hydraulic pipe clamps 4, 5 and two pairs of hardened clamping jaws 6a, 6b; 7a, 7b, with which the tube 3 is fixed in the separating device 1 (see FIG. 4). In this case, one of the pipe clamps 4, 5 and two of the clamping jaws 6a, 6b; both on the inlet side 8 and on the outlet side 9; 7a, 7b arranged. In this way, / 22

-8both the incoming section of the tube 3 and the section 2 to be separated are held securely.

The separating device 1 further comprises a knife holder 10 with a knife 11 (see FIG. 6). The knife 11 is made of hardened steel and is comparatively small. The knife holder 10 can move the knife 11 linearly along the arrow 12 from the basic position of the knife 11 shown in FIG. 6 into the cutting positions shown in FIGS. 7 to 12. After the separation process has been carried out, the knife 11 can again be moved linearly into the basic position along the arrow 12.

The separating device 1 further comprises a swivel drive 13 which can move the knife holder 10 together with the knife 11 along the arrow 14 in the circumferential direction of the tube 3 (see FIG. 6). The swivel drive 13 can comprise a worm or spur gear or a comparable assembly in order to be able to move the knife holder 10 concentrically around the tube 3. The swivel drive 13 has a free passage for the tube 3.

Before the section 2 is separated from the tube 3, slots 15 are introduced into the tube 3 or preferably into the flat raw material from which the tube 3 is manufactured, at predetermined intervals from one another. The distances between the slots 15 correspond to the length of the sections 2 of the tube 3 to be separated. FIG. 5 shows that the slots 15 extend somewhat in the circumferential direction of the tube 3. The width of the slots 15 in the longitudinal direction of the tube corresponds to the width of the knife 11 in the longitudinal direction of the tube plus a small amount of clearance.

/ 22nd

It can be provided that the slots 15 are punched into the tube or the raw material. There is definitely

Possibility of introducing the slits 15 into the pipe 3 or the raw material by other methods, such as, for example, using a

Laser beam.

Instead of a slot 15, there is also the possibility of introducing differently shaped openings, for example openings with an oval or a rectangular or a circular cross section, into the tube 3 or the raw material.

To cut off the section 2, the knife 11 is moved along the arrow 12 between the clamping jaws 6a, 6b on the inlet side 8 on the one hand and the clamping jaws 7a, 7b on the outlet side 9 on the other hand into the slot 15, so that the tip of the knife 11 protrudes into the interior of the tube 3 (see Fig. 7). Then the knife 11 is moved in the circumferential direction through the wall of the tube 3 (see FIGS. 8 to 12), so that the material of the wall of the slowly rotating knife 11 from inside to outside against the clamping jaws 6a, 6b; 7a, 7b is sheared off. The jaws 6a, 6b; 7a, 7b have the function of serving as counterholders during the shearing process. Between the jaws 6a, 6b; 7a, 7b there is a free space 16 for the unrestricted pivoting movement of the knife 11 (see FIG. 4).

Due to the position of the knife 11 during the separation process, the material of the wall of the tube 3 with the width of the knife 11 is peeled outwards. The jaws 6a, 6b; 7a, 7b serve as counter-cutting edge for the knife 11. The scrap produced falls out of the separating device 1 at the end of the separating process. The / 22

The formation of a burr is avoided by this slow shearing or peeling from the inside out.

After the separation process, the knife 11 is moved back into the basic position, so that the separation system is ready for the next separation process.

It is quite possible to provide two knives instead of a knife 11, which are preferably made at a rotation angle of 180 ° to one another, that is to say opposite one another in the radial direction of the tube 3. This can reduce the time required for the cutting process because two knives shear the wall of the tube at the same time.

Provision can also be made to use more than two knives, which are then in particular spaced apart from one another by angular distances which correspond to 360 ° by the number of knives.

/ 22nd

Claims (15)

claims: 1. Separating device (1) for pipes (3), comprising - clamping means for fixing a tube (3) relative to the separating device (1), - a knife (11) with which the tube (3) fixed by the clamping means can be severed, - A knife holder (10) which can move the knife relative to the fixed tube (3), characterized in that the knife holder (10) and / or the separating device (1) are designed such that the knife (11 ) is moved in the circumferential direction of the tube (3), in particular is moved in the circumferential direction over the entire circumference of the tube (3). 2. Separating device (1) according to claim 1, characterized in that the knife (11) consists of hardened steel. 3. Separating device (1) according to one of claims 1 or 2, characterized in that the separating device (1) is designed such that the knife (11) shears the material of the tube (3) from the inside to the outside. 4. Separating device (1) according to one of claims 1 to 3, characterized in that the clamping means comprise clamping jaws (6a, 6b; 7a, 7b), which in particular likewise consist of hardened steel. 12/22 5. Separating device (1) according to claim 4, characterized in that the separating device (1) is designed such that the knife (11) shears the material of the tube (3) against the clamping jaws (6a, 6b; 7a, 7b). 6. Separating device (1) according to one of claims 1 to 5, characterized in that the separating device (1) comprises more than one knife (11), the knives (11) being arranged in the knife holder (10) spaced apart in the circumferential direction, in particular where the knives (11) are at equal angular distances from one another in the circumferential direction. 7. separating device (1) according to claim 6, characterized in that the knife holder (10) and / or the separating device (1) are designed such that the knife (11) in the circumferential direction of the tube (3) over a circumferential angle during the separation process are moved, the size of the circumferential angle corresponding essentially to 360 ° divided by the number of knives (11). 8. Separating device (1) according to one of claims 1 to 7, characterized in that the separating device (1) comprises a swivel drive (13) which the knife holder (10) with the knife (11) in the circumferential direction around the tube (3) can move. 9. separation system comprising a separation device (1) according to one of claims 1 to 8, characterized in that the separation system is designed such that the separation device (1) can be moved in the longitudinal direction of the tube, so that the separation device (1) a section (2 ) of the tube (3) at a predetermined position of the tube (3). 13/22 10. Separation system according to claim 8, characterized in that the separating device can be moved together with the tube (3) in the tube longitudinal direction in order to separate a section (2) of the tube (3) during the movement of the tube (3). 11. A method for severing a section of a tube, the method being carried out in particular with a severing system according to one of claims 9 or 10 or with a severing device (1) according to one of claims 1 to 8, characterized by the following method steps: - At least one opening is made in the raw material from which the tube (3) is manufactured or in the tube (3), the knife (11) of a separating device (1), in particular a separating device (1) according to one of claims 1 to 9, is introduced into the at least one opening, - The knife (11) is guided in the circumferential direction through the wall of the tube (3) until a section (2) of the tube (3) is separated. 12. The method according to claim 11, characterized in that during the movement of the knife (11) in the circumferential direction, the material of the tube (3) is sheared from the inside to the outside. 13. The method according to any one of claims 11 or 12, characterized in that more than one opening is provided, the openings being spaced apart in the longitudinal direction of the tube. 14/22 14. The method according to any one of claims 11 to 13, characterized in that the opening is designed as a slot (15) which extends in particular in the circumferential direction of the tube (3). 15. The method according to any one of claims 11 to 14, characterized in that the width of the opening, in particular the width of the slot (15), substantially corresponds to the width of the knife (11) in the longitudinal direction of the tube (3), in particular the width of the knife (11) plus a small franking. 15/22 1.6